HelenOS sources

EHCI_USED_INTERRUPTS  138 uspace/drv/bus/usb/ehci/hc.c 	EHCI_WR(code->cmds[1].value, EHCI_USED_INTERRUPTS);
EHCI_USED_INTERRUPTS  460 uspace/drv/bus/usb/ehci/hc.c 	EHCI_WR(instance->registers->usbintr, EHCI_USED_INTERRUPTS);